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P. R. Williamson

Core outcome set for surgical trials in gastric cancer (GASTROS study): international patient and healthcare professional consensus
How are trial outcomes prioritised by stakeholders from different regions? Analysis of an international Delphi survey to develop a core outcome set in gastric cancer surgery
Methods for conducting international Delphi surveys to optimise global participation in core outcome set development: a case study in gastric cancer informed by a comprehensive literature review